Materials & Process (1)

Question 1

Which statement regarding aircraft bolts is correct?

a. When tightening castellated nuts on drilled bolts, if the cotter pin holes do not line up, it is permissible to overtighten the nut to permit alignment of the next slot with the cotter pin hole

b. In general, bolt grip lengths should equal the material thickness

c. Alloy steel bolts smaller than ¼ -inch diameter
should not be used in primary structure

Answer 1

b. In general, bolt grip lengths should equal the material thickness

Question 2

How many of these factors are considered essential knowledge for** x-ray exposure?**

1. Processing of the film
2. Material thickness and density
3. Exposure distance and angle
4. Film characteristics

a. One
b. Three
c. Four

Answer 2

b. Three

Question 3

What precision measuring tool is used for measuring
crankpin and main bearing journals for out-of-round wear?

a. Dial gauge
b. Micrometer caliper
c. Depth gauge

Answer 3

b. Micrometer caliper

Question 4

On a fillet weld, the penetration requirement includes what percentage(s) of the base metal thickness?

a. 100 percent
b. 25 – 50 percent
c. 60 – 80 percent

Answer 4

b. 25 – 50 percent

Question 5

What is descriptive of the annealing process of steel during after it has been annealed?

a. Rapid cooling; high strength
b. Slow cooling; low strength
c. Slow cooling; increased resistance to wear

Answer 5

b. Slow cooling; low strength

Question 5

Which tool can be used to determine piston pin out of-round wear?

a. Telescopic gauge
b. Micrometer caliper
c. Dial indicator

Answer 5

b. Micrometer caliper

Question 6

Which of the following is a main determinant of the dwell time to use when conducting a dye r fluorescent penetrant inspection?

a. The size and shape of the discontinuities
being looked for
b. The size and shape of the part being
inspected
c. The type and/or density of the part material

Answer 6

a. The size and shape of the discontinuities
being looked for

Question 7

Which statement relating to the residual magnetizing inspection method is true?

a. Subsurface discontinuities are made readily apparent
b. It is used in practically all circular and longitudinal magnetizing procedures
c. It may be used with steels which have been heat treated for stressed applications

Answer 7

c. It may be used with steels which have been
heat treated for stressed applications

Question 8

In examining and evaluating a welded joint, a mechanic should be familiar with

a. Likely ambient exposure conditions and intended use of the part, along with type of weld and original part material
composition
b. The welding technique, filler material,
and temperature range used
c. The parts, proportions, and formation of
a weld

Answer 8

a. Likely ambient exposure conditions and
intended use of the part, along with
type of weld and original part material
composition

Question 9

**Circular magnetization of a part can be used to detect which defects?

a. Defects parallel to the long axis of the part
b. Defects perpendicular to the long axis of the part
c. Defects perpendicular to the concentric circles of magnetic force within the part

Answer 9

a. Defects parallel to the long axis of the part

Question 10

(1) In nondestructive testing a discontinuity may be defined as an interruption in the normal physical structure or configuration of a part

(2) A discontinuity may or may not affect the usefulness of a part. Regarding the above statements,

a. Only No.1 is true
b. Only No.2 is true
c. Both No.1 and No. 2 are true

Answer 10

c. Both No.1 and No.2 are true

Question 11

In performing a dye penetrant inspection, the developer

a. Seeps into a surface crack to indicate the
presence of a defect
b. Acts as a blotter to produce a visible indication
c. Thoroughly cleans the surface prior to inspection

Answer 11

b. Acts as a blotter to produce a visible indication

Question 12

If it is necessary to accurately measure the diameter of a hole approximately ¼ inch in diameter, the mechanic should use a

a. Telescoping gauge and determine the size of the hole by taking a micrometer reading of the adjustable end of the telescoping gauge

b. 0 - to 1-inch inside micrometer and read the measurement directly from the micrometer
c. Small-hole gauge and determine the size of the hole by taking a micrometer reading of the ball
end of the gauge

Answer 12

c. Small-hole gauge and determine the size of the
hole by taking a micrometer reading of the ball
end of the gauge

Question 13

What method of magnetic particle inspection is used most often to inspect aircraft parts for invisible cracks and other defects?

a. Residual
b. Inductance
c. Continuous

Answer 13

c. Continuous

Question 14

What two types of indicating mediums are available for magnetic particle inspection?

a. Iron and ferric oxides
b. Wet and dry process materials
c. High retentivity and low permeability material

Answer 14

b. Wet and dry process materials

Question 15

If dye penetrant inspection indications are not sharp and clear, the most cause is that part

a. Was not correctly degaussed before the developer
was applied
b. Has no appreciable damage
c. Was not thoroughly washed before the
developer was applied

Answer 15

c. Was not thoroughly washed before the
developer was applied

Question 16

What aluminum alloy designations indicate that the metal has received no hardening or tempering treatment

a. 3003-F
b. 5052-H36
c. 6061-O

Answer 16

a. 3003-F

Question 17

Which heat-treating operation would be performed when the surface of the metal is changed chemically by introducing a **high carbide or nitride content?
**
a. Tempering
b. Normalizing
c. Case hardening

Answer 17

c. Case hardening

Question 18

What nondestructive testing method requires little or no part preparation, is used to detect surface or near surface defects in most metals, and may also be used to separate metals or alloys and their heat treat conditions?

a. Eddy current inspection
b. Ultrasonic inspection
c. Magnetic particle inspection

Answer 18

a. Eddy current inspection

Question 18

Unless otherwise specified, torque values for tightening aircraft nuts and bolts relate to

a. Clean, dry threads
b. Clean, lightly oiled threads
c. Both dry and lightly oiled threads

Answer 18

a. Clean, dry threads

Question 19

How is the locking feature of the fiber type locknut obtained?

a. By the use of an unthreaded fiber locking insert

b. By a fiber insert held firmly in place at the base of the load carrying section

c. By making the threads in the fiber insert slightly smaller than those in the load carrying section

Answer 19

a. By the use of an unthreaded fiber locking
insert

Question 20

When the specific torque value for nuts is not given, where can the recommended torque value be found?

a. AC 43. 13-1B
b. Technical Standard Order
c. AC43. 13-2A

Answer 20

a. AC 43. 13-1B

Question 21

Alclad is a metal consisting of

a. Aluminum alloy surface layers and a pure
aluminum core
b. Pure aluminum surface layers on an
aluminum alloy core
c. A homogeneous mixture of pure aluminum
and aluminum alloy

Answer 21

b. Pure aluminum surface layers on an
aluminum alloy core

Question 22

Which of the following defects are not acceptable for metal lines?
1. Cracked flare
2. Seams
3. Dents in the heel of a bend less than 20% of the
diameter
4. Scratches/nicks on the inside of a bend less than
10% of wall thickness
5. Dents in straight section that are 20% of tube
diameter

a. 1,2,3,4 and 5
b. 1,2 and 3
c. 1,2,3 and 5

Answer 22

c. 1,2,3 and 5

Question 23

Which heat-treating process of metal produces a hard, wear-resistant surface over a strong, tough core?

a. Case hardening
b. Annealing
c. Tempering

Answer 23

a. Case hardening